[PATCH 3/4] bpftool: fix error message when function can't register struct_ops

[Sahid Orentino Ferdjaoui <sahid.ferdjaoui@xxxxxxxxxxxxxxxxxxxxxxxx>]

It is expected that errno be passed to strerror().

Signed-off-by: Sahid Orentino Ferdjaoui <sahid.ferdjaoui@xxxxxxxxxxxxxxxxxxxxxxxx>
---
 tools/bpf/bpftool/struct_ops.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/tools/bpf/bpftool/struct_ops.c b/tools/bpf/bpftool/struct_ops.c
index 68281f9b7a0e..e0927dbb837b 100644
--- a/tools/bpf/bpftool/struct_ops.c
+++ b/tools/bpf/bpftool/struct_ops.c
@@ -513,8 +513,7 @@ static int do_register(int argc, char **argv)
 		link = bpf_map__attach_struct_ops(map);
 		if (libbpf_get_error(link)) {
 			p_err("can't register struct_ops %s: %s",
-			      bpf_map__name(map),
-			      strerror(-PTR_ERR(link)));
+			      bpf_map__name(map), strerror(errno));
 			nr_errs++;
 			continue;
 		}
--
2.34.1